Paco Cárdenas, Sandrine Chenesseau, Jim Drewery, Alexander Ereskovsky
{"title":"东北大西洋高尔夫球海绵属的直接发育(Demospongiae, tetrtinellia)。","authors":"Paco Cárdenas, Sandrine Chenesseau, Jim Drewery, Alexander Ereskovsky","doi":"10.1002/mrd.70059","DOIUrl":null,"url":null,"abstract":"<p>Among the eight types of development in sponges, the least common and least studied is direct, non-larval development during viviparity. To supplement our knowledge of this rare type of demosponge development, we present here a description of the embryonic development of four species of the genus <i>Craniella</i> (Demospongiae, order Tetractinellida) from the deep-sea in the Northeast Atlantic. <i>Craniella</i> development is asynchronous within one sponge. Mature oocytes are polylecithal and isolecithal. Embryonic development occurs in a dense double-layer follicle: layers of flattened cells and a thick layer of collagen. The cleavage is total, unequal, and asynchronous. It is characterized by collagen layers penetrating inside the embryo and surrounding blastomeres. As a result of cleavage, an oval-shaped apolar stereoblastula is formed. At the stereoblastula stage, embryonic sclerocytes secrete the first megascleres, long thin oxeas, radially positioned. Later, the embryo is divided into the peripheral, intermediate, and central zones. In the intermediate zone, choanocyte chambers, lacunes, and canals of the aquiferous system are formed. The fully formed juveniles have a subspherical to flattened shape with cone-shaped outgrowths on the surface. Unlike the adults, juveniles lack cortical microxeas and have characteristic anamonaenes spicules. The juveniles exit the mother's body through the exhalant canals of the aquiferous system.</p><p>\n <b>Trial Registration:</b> Not applicable</p>","PeriodicalId":18856,"journal":{"name":"Molecular Reproduction and Development","volume":"92 10","pages":""},"PeriodicalIF":3.0000,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mrd.70059","citationCount":"0","resultStr":"{\"title\":\"Direct Development of Golf Ball Sponges, Genus Craniella (Demospongiae, Tetractinellida) From the Northeast Atlantic Ocean\",\"authors\":\"Paco Cárdenas, Sandrine Chenesseau, Jim Drewery, Alexander Ereskovsky\",\"doi\":\"10.1002/mrd.70059\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Among the eight types of development in sponges, the least common and least studied is direct, non-larval development during viviparity. To supplement our knowledge of this rare type of demosponge development, we present here a description of the embryonic development of four species of the genus <i>Craniella</i> (Demospongiae, order Tetractinellida) from the deep-sea in the Northeast Atlantic. <i>Craniella</i> development is asynchronous within one sponge. Mature oocytes are polylecithal and isolecithal. Embryonic development occurs in a dense double-layer follicle: layers of flattened cells and a thick layer of collagen. The cleavage is total, unequal, and asynchronous. It is characterized by collagen layers penetrating inside the embryo and surrounding blastomeres. As a result of cleavage, an oval-shaped apolar stereoblastula is formed. At the stereoblastula stage, embryonic sclerocytes secrete the first megascleres, long thin oxeas, radially positioned. Later, the embryo is divided into the peripheral, intermediate, and central zones. In the intermediate zone, choanocyte chambers, lacunes, and canals of the aquiferous system are formed. The fully formed juveniles have a subspherical to flattened shape with cone-shaped outgrowths on the surface. Unlike the adults, juveniles lack cortical microxeas and have characteristic anamonaenes spicules. The juveniles exit the mother's body through the exhalant canals of the aquiferous system.</p><p>\\n <b>Trial Registration:</b> Not applicable</p>\",\"PeriodicalId\":18856,\"journal\":{\"name\":\"Molecular Reproduction and Development\",\"volume\":\"92 10\",\"pages\":\"\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2025-10-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mrd.70059\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Molecular Reproduction and Development\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/mrd.70059\",\"RegionNum\":3,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"BIOCHEMISTRY & MOLECULAR BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Reproduction and Development","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mrd.70059","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
Direct Development of Golf Ball Sponges, Genus Craniella (Demospongiae, Tetractinellida) From the Northeast Atlantic Ocean
Among the eight types of development in sponges, the least common and least studied is direct, non-larval development during viviparity. To supplement our knowledge of this rare type of demosponge development, we present here a description of the embryonic development of four species of the genus Craniella (Demospongiae, order Tetractinellida) from the deep-sea in the Northeast Atlantic. Craniella development is asynchronous within one sponge. Mature oocytes are polylecithal and isolecithal. Embryonic development occurs in a dense double-layer follicle: layers of flattened cells and a thick layer of collagen. The cleavage is total, unequal, and asynchronous. It is characterized by collagen layers penetrating inside the embryo and surrounding blastomeres. As a result of cleavage, an oval-shaped apolar stereoblastula is formed. At the stereoblastula stage, embryonic sclerocytes secrete the first megascleres, long thin oxeas, radially positioned. Later, the embryo is divided into the peripheral, intermediate, and central zones. In the intermediate zone, choanocyte chambers, lacunes, and canals of the aquiferous system are formed. The fully formed juveniles have a subspherical to flattened shape with cone-shaped outgrowths on the surface. Unlike the adults, juveniles lack cortical microxeas and have characteristic anamonaenes spicules. The juveniles exit the mother's body through the exhalant canals of the aquiferous system.
期刊介绍:
Molecular Reproduction and Development takes an integrated, systems-biology approach to understand the dynamic continuum of cellular, reproductive, and developmental processes. This journal fosters dialogue among diverse disciplines through primary research communications and educational forums, with the philosophy that fundamental findings within the life sciences result from a convergence of disciplines.
Increasingly, readers of the Journal need to be informed of diverse, yet integrated, topics impinging on their areas of interest. This requires an expansion in thinking towards non-traditional, interdisciplinary experimental design and data analysis.